Question
PSLE
A box contains white, purple and red marbles. 511 of the marbles are white. 12 of the remaining marbles are purple. What fraction of the marbles in the box are red?
2 m

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PSLE
A box contains white, purple and red marbles. 511 of the marbles are white. 12 of the remaining marbles are purple. What fraction of the marbles in the box are red?